Selection-switch.



J. A. KROPP.

SELECTOR SWITCH.

APPLICATION FILED OCT. 11. 19W.

& m 6 2 W 1! m w m P .NN Q A QN o w Q\ Q 5 1 n v m 2 Ski 1 Affy UNITED STATES PATENT OFFICE.

JOHN A. KROPP, OF OAK PARK, ILLINOIS, ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

SELECTOR-SWITCH.

Specification of Letters Patent.

Patented Feb. 26, 1918.

Application filed October 11, 1916. Serial No. 124,947.

To all whom it may concern:

Be it known that I, JOHN A. KROPP, a citizen of the United States, residing at Oak Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Selector-Switches, of which the following is a full, clear, concise, and exact description.

This invention relates to selecting switches of the two-movement type.

This invention has for its purpose the construction of a switch employing a single operating means for accomplishing its selecting and releasing movements.

Figure 1 is a front elevation of the improved switch structure, only those parts being shown which are necessary for a clear understanding of the invention; Fig. 2 is a plan view of the structure shown in Fig. 1; Fig. 3 shows a rear elevation of the improved switch structure; and Fig. 4 is a sectional view taken on line 44 of Fig. 1.

Referring in detail to the drawings, 5 designates a brush-carrying shaft mounted for vertical and rotary movement in the frame structure (not shown). To this shaft there are secured movable brushes 6 which engage the contacts 7 of switch bank 8. The shaft is provided with vertical ratchet teeth 9 and rotary ratchet teeth 10. A stationary dog 32 secured to the frame moves in a vertical slot out through the vertical ratchet teeth (Fig. 2), when the shaft operates in a vertical direction.

In the present invention a single motor magnet 11 is utilized in operating the shaft in its vertical and rotary movements. The armature 12 of the motor magnet 11 is provided at its free end with a pivoted pawl 13 adapted to engage the vertical ratchet teeth of the shaft. The armature 12 is also provided with arms 14 and 15, the purpose of which will be hereinafter described. The rotary ratchet teeth are engaged. by the totary pawl 16 carried by an arm 17 pivoted at one end to the frame. This arm is operated by a bell-crank lever 18 rotatably carried by a U-shaped rod 19, which in turn is operated by the tensioned rotary ratchet member 20. This ratchet member is controlled by escapement dogs 21 of well-known construction, and upon the retraction of the armature of escape magnet 22, this member is escaped in the well-known manner. Rod 19 at one of its ends is provided with a block 23 having a projection 29 which, under certain conditions, operates to throw the pawl 13 outside of the member 41, thus holding said pawl out of engagement with the shaft. The block 23 likewise carries a projecting member 40 which functions to throw the rotary pawl 16 out of engagement with the rotary ratchet 10 by means of the member 42 when the rotary ratchet member 20 has escaped into its last position. The rod 19 at its other end abut-s a hook-shaped member 24. This member 24 is pivotally attached at one end to the bell-crank lever 25, which is pivoted to the frame. This lever operates when book 24 is raised by the arm 15, to

move the ratchet member 20 back to its normal position. The hook-shaped member 24 also governs a second bell-crank lever 26, pivoted to the frame. One end of the lever 26 is slotted to engage a pin carried by the hook member 24, and the other end carries a roller which operates in the release move ment of the switch. A vertical holding dog 27 and a rotary holding dog 28 are rotatably mounted on a common axis secured to the frame. These members are provided with lugs 31 and 30 respectively, which are so spaced that the holding dogs 27 and 28 do not interfere with each other, while functioning to hold the shaft. Then, however, the roller carried by the bell-crank lever 26 engages the rotary holding dog to throw it out of engagement with the rotary ratchet, the lug 30 engages the lug 31 to move the vertical holding dog out of engagement with the vertical ratchet.

Referring to the operation, it should be noted that the motor magnet 11 operates the armature 12 to drive the shaft through its vertical and rotary movements as well as to release the switch to its normal position, when it is desired to sever the established connection. The escape magnet operates to translate the vertical movement of armature 12 of the motor magnet to accomplish the rotary and release movements of the switch.

In detail the operation of the switch is as follows: The impulses from the calling dial energize the motor magnet 11, causing it to attract its armature 12 to elevate the shaft the desired number of steps. It will here be noted that the projection on vertical pawl 13, in this instance, does not engage the projection 29 of controlling block 23. At the close of the first series of directive impulses,

the escape magnet 22 is deenergized and permits the ratchet member 20 to move the rod 19 one step, thereby bringing the bell-crank lever 18 into operative relation with arm 14 on the armature 12, and places the stop 29 of controlling member 23 in the path of the vertical pawl'13 to throw this pawl out of engagement with the vertical ratchet teeth. It will be understood that the vertical holding dog 27 serves to hold the brush shaft during its elevation and that after the first rotary step of the shaft 5, the stationary dog 32 serves to hold the shaft in the position to which it has been elevated. Under the next series of directive impulses, the shaft is rotated as follows: The armature 12 is attracted in response to the repeated energization and de'e'nergiz'at-ions of the motor magnet 11, but its vertical movement is translated into a horizontal movement by the bell-crank lever 18 which causes the pivoted member 17 to drive the rotary pawl 16, thereby rotating the sha'ftto thedesired line. lVhen the desired line is reached, the escape magnet 22 is again de'e nergized, permitting the escapement member 20 to again move the rod 19 another step. This" brings the projecting member 40 into operative relation with the rotary pawl 16 which places the member 12 in the path of said rotary pawl to throw it out of engagement with the ro tary ratchet 10 and also drives the hook member 2% over the lug 15, whereupon the energization of the magnet 11 at the close of the conversation causes the hook member 2a to be elevated. This restores the escapement member to its normal position and throws the holding dogs out of engagement with the shaft as follows: The roller carried by the bell crank lever 26 engages the rotary holding dog 28, forcing it out of engagement with the rotary ratchet teeth. The rotary holding dog which is provided with a projection 30 engages a projection 31 of the vertical holding dog 27, whereby continued movement of the rotary holding dog throws the vertical holding dog 27 out of engagement with the shaft. The elevation of the hook member 24 operates the bell crank lever 25 to move the escapement member to its normal position. The retractile spring 33 rotates the shaft until the stationary dog 32 encounters the vertical slot in the shaft, whereupon the shaft drops to its normal position.

What is claimed is:

1. In a selecting switch, passive contacts,

active cont-acts mounted for group and line selecting movements in two planes, means for controlling the operations of said active contacts, and a single means for operating said active contacts and for restoring the active contacts and controlling means to normal position.

In a selecting switch, passive contacts, active contacts mounted for movement in two planes, means for controlling the operations of said active contacts, and a single means for operating said active contacts and for restoring the active contacts and controlling means to normal position.

8. In a selecting switch, passive contacts, active contacts, a member carryings'aid active contacts, said member being mouiited for vertical and rotary movement, a single actuating means for said member, and means for applying the energy of said actuating means to control the selecting and re leasing movements of said member.

1. In a selecting switch, passive contacts, active contacts, a shaft to which said active contacts are secured, said shaft being mounted for vertical and rotary"movement, means operating in one directionfor actuatiing said shaft in allits movements, and means including a bell crank lever for con trolling the selecting and releasing movements of said shaft.

5. In a numerical switch, passive contacts, active contacts, a shaft to which said active contacts are secured, said shaft being mounted for rotary and vertical'inovements, a single electromagnetic means o] )erating' in one direction for controlling its selecting and releasing movements, and means for controlling the sequence ofthe'se movements.

6. In a numerical switch, pa sive contacts, active contacts, a shaft to which said active contacts are secured, said shaft being mounted for movement in two directions, a single electromagnetic means provided with an armature, a primary pawl operated by said armature to move said shaft 'in' one direction, a secondary pawl mounted to move said shaft in another direction, a bell crank lever adapted to be actuated by said armature to operate said second pawl, means to control the operation of said primary and secondary pawls. and means to restore said shaft and controlling means to normal position.

7. In a numerical switch, passive contacts, active contacts, a shaft to which said active contacts are secured, said shaft being mounted for movement.- in two directions, a single electromagnetic means provided with an armature, a primary pawl operated by said armature to move said shaft in one direction, a secondary pawl mounted to move said shaft in another direction, a bell crank lever adapted to be actuated 'by said armature to operate said second pawl, means to control the o eration of said primary and secondary paw s, and means actuated by said armature to restore said shaft and controlling means to normal position.

8. In a selecting switch, passive contacts,

active contacts mounted for group and line selectin movements in different planes, a controlling device for controlling the se- JOHN A. KROPP.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

